The keyword phrase "patriots day massachusetts 2013" functions grammatically as a proper noun phrase. It operates as a single unit to name a specific, unique historical event: the observance of the Patriots' Day holiday in the state of Massachusetts during the year 2013.
This phrase is constructed from several components that collectively provide specificity. The core is the proper noun "Patriots' Day." This is modified by "Massachusetts," which acts as a proper adjective or noun adjunct to specify the location, and by the numeral "2013," which functions adjectivally to specify the temporal context. The combination of these elements moves the term from a general holiday to a singular, non-repeatable point in time and space.
For the purpose of an article, establishing the keyword as a proper noun phrase is crucial because it dictates that the main point or subject is the event itself. The article's focus should be an exposition of what occurred on that specific day, its context, and its significance. In this particular case, the phrase is overwhelmingly associated with the Boston Marathon bombing, making that incident the central subject matter an article using this keyword must address.
